Novo amostrador para as terras roxas

Bragantia, Feb 2019

In this paper is described a new soil sampler, specially designed for use in sampling Brazilian purple-soil series, which is known to present very peculiar physical properties. The sampler was developed as a result of the need to sample the soil frequently, for the purpose of maintaining the soil water balance in irrigation experiments, carried on field plots. This basic method of controlling water application in such experiments is being extensively used by the Seção de Irrigação, of the Instituto Agronômico. Detailed drawings ond some pictures are shown to allow interested persons or organizations, facing similar problems, to have models of the new sampler built in any good machine shop. The new sampler is very similar in its general characteristics to Veihmeyer's soil sampling tube, and was developed after the failure of this last sampler to operate properly in Brazilian purple-soils

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Novo amostrador para as terras roxas

Novo amostrador para as terras roxas   A new soil sampler specially designed for brazilian purple-soil series     Rino N. Tosello Engenheiro-agrônomo, Seção de Irrigação, Instituto Agronômico     RESUMO Neste trabalho descreve-se um novo amostrador tubular, de percussão, especialmente desenvolvido para a amostragem freqüente do solo, em terras roxas, para fins de determinação de umidade e controle de irrigação. Um desenho detalhado do novo amostrador é apresentado, com tôdas as indicações necessárias para que as pessoas ou organizações interessadas possam mandar construir novos modelos, em qualquer oficina mecânica bem aparelhada. SUMMARY In this paper is described a new soil sampler, specially designed for use in sampling Brazilian purple-soil series, which is known to present very peculiar physical properties. The sampler was developed as a result of the need to sample the soil frequently, for the purpose of maintaining the soil water balance in irrigation experiments, carried on field plots. This basic method of controlling water application in such experiments is being extensively used by the Seção de Irrigação, of the Instituto Agronômico. Detailed drawings ond some pictures are shown to allow interested persons or organizations, facing similar problems, to have models of the new sampler built in any good machine shop. The new sampler is very similar in its general characteristics to Veihmeyer's soil sampling tube, and was developed after the failure of this last sampler to operate properly in Brazilian purple-soils     Texto completo disponivél apenas em PDF. Full text available only in PDF format.     LITERATURA CITADA 1.  BAVER, L. D. Soil physics. John Wiley & Sons, New York, 1940. p. 174-175.         [ Links ] 2.  BROWN, J. B. Soil sampling tools. Univ. California, 1945. 7 p. [mimeografado]         [ Links ] 3.  ESSELEN, D. J. Citrus irrigation practices. S. Africa Dept. Agric, 1937. (Sci. Bull. N.° 169)        [ Links ] 4.  ISRAELSEN, O. W. Studies on capacities of soils for irrigation water, and a new method of determining votume weight. J. agric. Res. 1:1-35. 1918.         [ Links ] 5.  PALMER, A. E. Use of irrigation water on farm crops. Dominion of Canada Dept. Agric, 1939. (Publication N.° 509)        [ Links ] 6.  SARMISH, R. M. Irrigation requirements of a young citrus orchard. Ktavim, Rehovot, Israel, 8(2-3):123-129. 1957.         [ Links ] 7.  TOSELLO, R. N. Irrigação do cafèzal. In Instituto agronômico do Estado de São Paulo. I Curso de Cafeicultura, 1954. 3.ª edição, 1957. p. [183]-193.         [ Links ] 8. __________ Plano para o ensaio de determinação da capacidade de campo. Instituto agronômico, Seção de Conservação do Solo, 1954. 1 p. [mimeografado]         [ Links ] 9.  VEIHMEYER, F. J. An improved soil sampling tube. Soil Sci. 2:147-152. 1929.         [ Links ] 10. __________Total pore space of soils in place in the field. Report of the Committee on Physics of Sail Moisture, 1934-35. Amer. Geophys. Un. Trans. Sixteenth Ann. Meet.: 426-432. 1935.         [ Links ] 11. __________ & HENDRICKSON, A. H. Soil moisture as an indication of root distribution in deciduous orchards. Plant Physiol. 13:169-177. 1938.         [ Links ]     Recebido para publicação em 10 de dezembro de 1959.


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Rino N. Tosello. Novo amostrador para as terras roxas, Bragantia, 653-666, DOI: 10.1590/S0006-87051960000100041